When driving up the Canyon it overheats

THanks I will def have it checked

My 2005 3.8 v6 Grand prix overheats while idle. No problem when the care is in motion. Even if temp gets to red, I can start driving and it cools down instantly. I have not noticed any coolant leaks yet. I watched the fans and they are pulling air through the radiator, when I turn the AC on it does not seem to increase any airflow.

Does anyone have any thoughts on what it could be? Or any other troubleshooting I should do?

Just idling is all I have tried. As soon as it started to heat up it, I took off down the road to cool it off. This came on all of a sudden no new work. It heats up even with AC off. The coolant level was a little low at my last oil change but nothing significant. That was before this occured.

I have a 2003 pontiac grand prix. It started overheating a few weeks ago. Replaced the head and intake gaskits. Ran fine for a day or two. Began running hot again. Replaced thermostat, No change. Replaced water pump. No change. Flushed radiator. No change. Will idle cool, but when you press gas or try to drive it instantly begins to heat up. Heater does not get hot even after new thermostat.

Yes the fan is working. The temp gauge reads cool until you rev engine or drive, then it jumps almost to red instantly. We kill it before it reaches red. Not sure of coolant flow. Motor seems to be hot while radiator and cap stay cool.

Engine Cooling problem
2001 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

in regards to last post about my over heating 3100 grand prix, I wanted to note that this is not a slow process. As soon as I start the car it begins to jump to overheating temps. I dont know if thats is too fast for a gasket issue or if I just missed a step in all the installs. Thank you

The engine is a 3100, 6 cylinder. The fans kick on but don't seem to help much. Once it starts getting hot all you can do is kill the engine. Have not tried to drive. It does have a radiator cap. I can see water in radiator. And no the hose on the radiator does not get hot. Niether does cap. Just the motor. LIke there is no coolant or water flow. Will try what you suggested, maybe we bought a bad thermostat. Could it be a sensor, aking it run hot.

You say it might be the temp sensor wiring or sensor its self. The inst. Cluster in the vehicle also shows a full tank of gas all the time. When I put the key on acc the tack of the fuel level will quickly show the amount of gas in the vehicle. When I start the car it will shoot to full. Could the temp gauge also be screwing with me and I did this for nothing. Not for nothing, I know, I feel safer with everything being replaced in this car. Could the instrument cluster be faulty. Its not mis reading my rps or mph. ? I took the cluster out of the car and some one removed the " check engine light" bulb from out of the back of it. SOB'z. If this helps, there is a good amount of dex cool on the pump side, but theres none on the thermo side.

3.1 engine, replaced the water pump, thermostat, still over heats, the bottom hose is cold and the top hose is hot.

I did put a bulb in it, and yes the light was on. I have not ran a code to it. I have now replaced the temp sensor. It runs at lower temps but not where it should. I did notice that now my cooling fans were not turning on. I checked all the relays and they were good. I pulled the fans out of the engine bay and checked with a 12 v current. They both kicked on indivisdually. The fans work when they are out but not with the cooling system.